Philadelphia - Penn Center

Northwest of City Hall is the Penn Center, a complex of hotels and high-rise office blocks, including the Central Penn National Bank and the IBM Building. Previously there was a tacit agreement that no buildings in this area should be higher than the statue of William Penn (550ft/168ft), but in recent years a whole series of skyscrapers have been built. Among them are One Liberty Place, at 1650 Market Street, the city's tallest building (945ft/288m), Two Liberty Place (1601 Chestnut Street; 845m/258m) and the Mellon Bank Center (1735 Market Street; 880ft/268m).